We are experiencing the exact same error as this site posted here: https://social.technet.microsoft.com/Forums/windowsserver/en-US/46cb543a-20b8-4741-9ee5-b734b3524cb2/wsus-unable-to-complete-post-installation?forum=winserverwsus
FixSubscriptionCategories failed. Exception: System.Web.Services.Protocols.SoapException: System.Web.Services.Protocols.SoapException: Server was unable to process request. ---> System.TypeInitializationException: The type initializer for 'Microsoft.UpdateServices.Internal.ApiRemoting' threw an exception. ---> System.UnauthorizedAccessException: Access to the path 'Update Services' is denied.
I have tried multiple times to uninstall WSUS, IIS, WID, Folder structure, remove WSUS administration site, etc... nothing has worked so far. Also getting BPA analyzer warning about SelfHelp folder is not configured properly. Please help!!
Windows Server 2012 R2, SCCM 2012 R2, WSUS 6.9.6300 ?